.container {
    width: 1000px;
    height: 500px;
    margin: auto;
    background-color: white;
    box-sizing: border-box;
    text-align: center;
}

.ZD {
    box-sizing: border-box;
    margin: 50px 150px;
    text-align: center;
    width: 610px;
    height: 610px;
    background-color: white;
    display: inline-block;
    overflow: hidden;
    text-align: center;
}

.A {
    box-sizing: border-box;
    width: 300px;
    height: 300px;
    background-color: wheat;
    border: double 5px rgb(182, 157, 110);
    text-align: center;
    padding-top: 30px;
    margin-bottom: 8px;
    float: left;
}

.B {
    box-sizing: border-box;
    width: 300px;
    height: 300px;
    background-color: wheat;
    border: double 5px rgb(182, 157, 110);
    text-align: center;
    padding-top: 30px;
    margin-bottom: 8px;
    float: right;
}

.C {
    box-sizing: border-box;
    width: 300px;
    height: 300px;
    background-color: wheat;
    border: double 5px rgb(182, 157, 110);
    text-align: center;
    padding-top: 30px;
    margin-bottom: 8px;
    float: left;
}

.D {
    box-sizing: border-box;
    width: 300px;
    height: 300px;
    background-color: wheat;
    border: double 5px rgb(182, 157, 110);
    text-align: center;
    padding-top: 30px;
    margin-bottom: 8px;
    float: right;
}

h1 {
    text-align: center;
}